In the recently released Windows Insider build 15042, the microstutter that's been plaguing many MSI (and other brand) laptops with Optimus seems to finally be fixed!
To clarify, this is the stutter that occurs when:

In the meantime you can download and run dGPUidle.exe from here: https://github.com/jobeid/dGPUidle. This app will run in the background, keeping the dGPU idle and awake but using minimal resources. It has to be run manually and NOT as part of windows startup. Let me know if this helps.

In the meantime you can download and run dGPUidle.exe from here: https://github.com/jobeid/dGPUidle. This app will run in the background, keeping the dGPU idle and awake but using minimal resources. It has to be run manually and NOT as part of windows startup. Let me know if this helps.

Or this (which is a better and more ressource friendly solution);https://github.com/jobeid/dGPUidle. This app will run in the background, keeping the dGPU idle and awake but using minimal resources. It has to be run manually and NOT as part of windows startup.

Or this (which is a better and more ressource friendly solution);https://github.com/jobeid/dGPUidle. This app will run in the background, keeping the dGPU idle and awake but using minimal resources. It has to be run manually and NOT as part of windows startup.